JPH10296129A - Air purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a dust collecting effect by forcibly drawing the dust present at a distance far from a dust collecting electrode to the dust collecting electrode. SOLUTION: This air purifier is constituted so that a dust charging means and an ionic wind inducing means are provided on the upstream side in a wind path facing from suction to blowout from suction, on the downstream side, a flat plate-shaped dust collecting electrode 40 is arranged in parallel to a flow of an ionic wind and the reverse polarity to the dust charging means is applied to the dust collecting electrode 40. In this case, counter electrodes 7 opposite in parallel to the dust collecting electrode 40 are installed. Potential of the same polarity as the dust charging means or potential of the ground level is applied to the counter electrodes 7. Between the dust collecting electrode 40 and the counter electrodes 7, an electric field is generated. In this way, dust collection by the dust collecting electrode 40 is made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for purifying indoor air.

[0002]

2. Description of the Related Art Conventionally, an air purifier requires a blower for sucking air in a room, purifying the air with an electric dust collector, and discharging the air, and the blower rotates a fan. There is a type that causes the ion wind and a type that induces the ion wind. The former can take a large amount of air,
When used in a place where noise is likely to be a problem, such as a bedroom, it is desirable to use the latter type of ion wind induction type because the noise is loud.

[0003]

However, in the conventional ion wind induction type, the dust sucked into the main body is charged, and the dust collection electrode arranged downstream thereof has a polarity opposite to that of the dust. A potential is applied and dust is collected by Coulomb force. However, since this Coulomb force is inversely proportional to the square of the distance, even if dust near the dust collection electrode is collected, the dust is separated from the dust collection electrode by a distance. There was a problem that dust in a distant place was difficult to be collected.

[0004] The present invention has been made in view of the above points, and it is possible to forcibly attract dust at a distance from the dust collecting electrode toward the dust collecting electrode to enhance the dust collecting effect. Another object of the present invention is to provide an air purifier capable of preventing contamination of a wall while having a structure capable of further enhancing the dust collecting effect. I do.

[0005]

In order to solve the above-mentioned problems, the present invention comprises a dust charging means and an ion wind inducing means on the upstream side in an air path from suction to blowing, and an ion wind inducing means on the downstream side. Dust collection electrode 4 parallel to the flow of
No. 0, an air purifier for applying a polarity opposite to that of the dust charging means to the dust collecting electrode 40, wherein an opposing electrode 7 is provided in parallel with the dust collecting electrode 40. This is characterized by applying a potential of the same polarity or a potential of the ground level. With such a configuration, an electric field is generated between the dust collecting electrode 40 and the counter electrode 7, so that dust collection is performed. Dust at a distance from the electrode 40 can be forcibly attracted to the dust collection electrode 40 by an electric field, and dust collection by the dust collection electrode 40 becomes easy.

Here, it is preferable that the main body housing that covers the outermost part of the air purifier 1 has conductivity, and the main body housing also serves as the counter electrode 7. In this case,
By applying a potential having the same polarity as the dust charging means or a ground level potential to the main body housing, an electric field can be generated between the dust collecting electrode 40 and the main body housing. However, the dust present can be forcibly drawn to the dust collecting electrode 40, and therefore, the dust collection by the dust collecting electrode 40 becomes easy without separately providing the counter electrode 7.

Further, the opposing electrodes 7 are arranged on both sides of the dust collecting electrode 40, and a ground level potential is applied to the opposing electrode 7 arranged on the wall 4 side during operation of the main body 2, and the opposing electrode 7 is disposed on the opposite side of the wall 4. Preferably, a potential having the same polarity as that of the dust charging means is applied to the opposite electrode 7 to be arranged. In this case, an electric field is generated between the dust collecting electrode 40 and the opposite electrodes 7 arranged on both surfaces thereof. It is possible to forcibly attract the dust at a distance from the dust collecting electrode 40 on both sides of the dust collecting electrode 40 to the dust collecting electrode 40, and to dispose the dust disposed on the wall 4 side. By setting the counter electrode 7 to a ground-level potential, an electric field is not generated between the main body 2 and the wall 4, and the possibility that dust adheres to the wall 4 can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 2 to FIG. 7 show the structure of the ion wind induction type air purifier 1. A suction port 11 is provided on the lower surface of the main body 2, and a blowout port 12 is provided on the upper surface of the main body 2. A body cover 1 is provided on both front and rear sides of the body 2.
3 and 13 are attached to the main body cover 13 by pressing a cover attaching / detaching button 95 provided on a side surface of the main body 2.
Is detached from the main body 2. 2a in FIG.
Denotes a body, and 90 denotes a power display light emitting unit. FIG. 3 shows a state where the main body cover 13 of the main body 2 is removed, and FIG. 4 shows a state where the discharge electrode block 15 is taken out.

As shown in FIG. 1, in the main body 2, from the bottom upward, a pre-filter 20, an electrode discharge block 15 having a discharge part 3 and a counter electrode part 4, and an electric dust collecting means 6 are arranged in this order, and the electric dust collecting means 6
A pair of opposing electrodes 7 to be described later are disposed to oppose each other. The pre-filter 20 is for collecting relatively large dust, and as shown in FIG. 5, includes a frame 21 and a net 22 made of, for example, a synthetic resin held by the frame 21. This pre-filter 20
It is detachably attached to the main body 2. 23 in the figure
Is a handle for attaching and detaching.

The discharge electrode block 15 constitutes a dust charging means for charging dust in the air to induce ion wind and an ion wind inducing means 5, and as shown in FIG. 6 and FIG. A rectangular electrode frame 30 having an opening, a discharge wire 31 disposed in a lower portion of the electrode frame 30, and an electrode frame 30.
And a counter electrode plate 35 made of a plurality of conductive thin steel plates arranged in parallel at the upper part of the inside. Discharge wire 31
Is mounted on the electrode frame 30 with both ends thereof being tensioned by the coil spring 32. The discharge wire 31
A tube 33 for insulation protection is put on a contact portion of the intermediate portion with the electrode frame 30. The discharge wire 31 is formed of, for example, a tungsten wire or a piano wire having a small wire diameter, and is electrically connected to the discharge wire terminal portion 34.

A plurality of counter electrodes 35 disposed above the discharge wire 31 are provided with insulating coating portions 36 having insulating coatings at both ends.
Are fixed to the electrode frame 30 and the insulating coating portion 36
A counter electrode terminal portion 37 is provided at a portion extending integrally from the electrode frame 30 and reaching the end surface of the electrode frame 30. The discharge electrode block 15 thus formed is detachable from the main body 2 by removing the main body cover 13. When mounted on the main body 2, it is supported by the main body 2 by supporting members (not shown) arranged on both sides inside the main body 2,
Contact springs 39 (FIG. 4) are provided on both support members, respectively. One of the contact springs 39 is in contact with the discharge wire terminal portion 34 and the other is in contact with the counter electrode terminal portion 37. A voltage of, for example, +6.5 kV is applied to the discharge line 31 through 39, and a voltage of, for example, -6.5 kV is applied to the return electrode plate 35.

As shown in FIGS. 8 and 9, the dust collecting portion 6a is made of a conductive thin steel plate and has a flow direction A of ionic wind.
It is formed in a substantially flat plate shape substantially parallel to (FIG. 1). The dust collecting portion 6a includes a dust collecting electrode 40 disposed at a central portion in the front-rear direction in the main body 2, a dust collecting paper 41 disposed on both front and rear surfaces of the dust collecting electrode 40, and a dust collecting electrode 41. A holding portion 43 rotatably arranged vertically at a lower end portion of the dust collecting electrode 40 via a hinge portion 43a to fix the dust collecting electrode 40 to the dust collecting electrode 4;
And a pair of opposing electrodes 7 arranged on both surfaces of the negative electrode 0 so as to face the dust collecting electrode 40 in parallel. A potential having the same polarity as that of the discharge portion of the discharge electrode block 15 is applied to the pair of opposed electrodes 7, and an electric field is generated between the opposed electrode 7 and the dust collection electrode 40. In addition, the dust collecting electrode 40 has a function of forcibly attracting dust that is far from the collecting electrode 40 to the collecting electrode 40. The holding portion 43 is provided with a permanent magnet 49 that magnetically attracts to the dust collecting electrode 40, and magnetizes and attracts the dust collecting electrode 40. An insulating coating 42 is provided on the entire surface of the dust collecting electrode 40 by applying an epoxy resin coating or the like. Further, after the dust collecting paper 41 is placed on the dust collecting electrode 40, both ends are bent downward, and then the pressing portion 43 is rotated to press and stop both ends of the dust collecting paper 41, so that the dust collecting electrode 40 is Be attached. As the dust collecting paper 41, kitchen paper or the like used in ordinary households can be used. Then, when the power is turned on, a voltage of, for example, -6.5 kV is applied to the dust collecting electrode 40, and a potential of, for example, 0 to +6.5 kV is applied to the counter electrode 7.

An ionization section 60 for discharging negative ions is disposed downstream of the dust collection section 6a. As shown in FIG. 1, the ionization section 60 includes a needle-like ionization needle 61 facing upward, and a grounding section 62 disposed above the ionization needle 61 at a predetermined interval. Ionization needle 61
For example, a voltage of -6.5 kV is applied to the
Are grounded, for example.

Next, the operation will be described. When the power switch of the air cleaner 1 having the above configuration is turned on, the discharge block 15
The above-described voltage is applied to the discharge wire 31, the counter electrode plate 35, and the dust collecting electrode 40. At this time, air near the discharge line 31 is ionized to generate positive ions, and the positive ions move toward the counter electrode plate 35 having a negative potential. The positive ions collide with molecules in the air during the movement, and the kinetic energy of the positive ions is given to the molecules in the air, so that the air moves. This is a wind called an ion wind, and an upward ion wind is generated by the movement of the molecules.

The suction wind 11 on the lower surface of the main body 2 in the direction of arrow A shown in FIG.
From the wind to the outlet 12 on the upper surface,
The dirty air in the room is sucked from the lower surface of the main body, and large dust is collected when passing through the pre-filter 20. Thereafter, in the discharge electrode block 15, the dust B in the air collides with the positive ions and becomes positive. Is charged. The positively charged dust B moves upward due to the ion wind, is attracted to the dust collecting electrode 40 of the dust collecting portion 6a having a negative potential by electrostatic force, and the dust covering the dust collecting electrode 40. It adheres to the dust paper 41.

At this time, a counter electrode 7 is provided in parallel with the dust collecting electrode 40, and an electric field is generated between the dust collecting electrode 40 and the counter electrode 7. However, it is possible to forcibly draw the dust present at the dust collecting electrode 40. That is, a positive potential having the same polarity as that of the discharge electrode block 15 is applied to the opposing electrode 7 that is disposed to face the dust collecting electrode 40 in parallel.
The positively charged dust is forcibly drawn toward the dust collecting electrode 40 by the electric field generated between the dust collecting electrode 40 and the counter electrode 7.

Thereafter, negative ions are added by the ionization needle 61 of the ionization section 60 provided near the outlet 12. In this ionization section 60,
Air near the tip of the ionization needle 61 is ionized to generate negative ions, and the grounding portion 6 grounded to the ionization needle 61.
The ionic wind is guided to the outlet 12 along the lines of electric force generated between the louver 2 and the outlet, and is further discharged from the outlet louver 70 into the room.

As a result, the air that has flowed into the main body 2 from the suction port 11 is purified, and negative ions, which are considered to be good for the human body, are added near the blowing port 12 and are discharged into the room. . Further, the above-described counter electrode 7 facilitates the collection of dust by the dust collecting electrode 40, and can enhance the dust collecting effect. Further, a positive potential having the same polarity as that of the discharge block 15 is applied to the counter electrode 7, but the present invention is not limited to this, and the counter electrode 7 may be grounded. Also in this case, since an electric field is generated between the dust collecting electrode 40 to which the negative potential is applied and the counter electrode 7, dust at a distance from the dust collecting electrode 40 is collected as in the above case. Electrode 40
The dust collecting electrode 4
0, the dust is easily collected. Further, by setting the counter electrode 7 to the ground level potential, even if the main body 2 is arranged close to the wall 4 as shown in FIG. Since an electric field is not generated between the wall 4 and the dust, the dust in the vicinity of the wall 4 is not charged, the possibility that the dust adheres to the wall 4 is reduced, and the wall 4 can be prevented from being stained. There is also.

Further, since the dust collecting electrode 40 and the counter electrode 7 are arranged in parallel with the flow of the wind, the flow of the wind is not obstructed. In addition, since the opposing electrodes 7 are arranged on both surfaces of the dust collecting electrode 40, electric fields can be generated between the dust collecting electrode 40 and the opposing electrodes 7 arranged on both surfaces thereof, respectively. It is possible to forcibly attract dust at a distance from the dust collecting electrode 40 on both sides to the dust collecting electrode 40, and the dust collecting electrode 4
0 can further enhance the dust collection effect.

In the case where the main body 2 is disposed close to the wall 4 as shown in FIG. 10, a ground level potential is applied to the counter electrode 7 disposed on the wall 4 side during operation of the main body 2. It is desirable to apply a potential having the same polarity as that of the discharge electrode block 15 to the counter electrode 7 disposed on the side opposite to the wall 4. In this way, by setting the counter electrode 7 disposed on the side of the wall 4 to the ground level potential, the main body 2 and the wall 4
No electric field is generated between the first and second walls, so that dust near the wall 4 is not charged, and the possibility that dust adheres to the wall 4 can be reduced. As a result, there is an advantage that the wall 4 can be prevented from being stained at the same time while having a structure that can further enhance the dust collecting effect.

Further, since the dust-collecting paper 41 is disposed on both front and rear surfaces of the dust-collecting electrode 40, the amount of the dust collected becomes extremely large. Since it is floating, the suction port 11 of the air purifier is provided on the lower surface of the main body 2 so as to suck the air near the floor, which is most effective in improving the suction efficiency of house dust.

When the dust collecting paper 41 needs to be replaced, the front and rear surfaces of the main body 2 can be exposed by pressing the cover attaching / detaching button 95 on the side of the main body 2 and removing the main body cover 13. After the pressing of the pressing portion 43 of the dust collecting portion 6a is removed, the dust collecting paper 41 is removed, a new dust collecting paper (for example, kitchen paper) is attached, and the pressing portion 43 presses the dust collecting paper. Reattach. At this time, since the front and rear surfaces of the main body 2 are largely opened, the dust collecting paper can be easily mounted, and furthermore, the fixing of the dust collecting paper can be performed only by pressing the pressing portion 43. Can be performed very easily.

FIG. 11 shows another embodiment. In this embodiment, the counter electrode 7 is omitted, and the main housing 2a on which the cover 80 made of a conductive resin is mounted also serves as the counter electrode. Then, the discharge electrode block 15 is placed on the cover 80 made of the conductive resin.
By applying a potential of the same polarity or a ground level potential, an electric field can be generated between the dust collecting electrode 40 and the cover 80, and dust at a distance from the dust collecting electrode 40 is collected. It can be forcibly drawn to the electrode 40, and therefore, without separately providing a counter electrode,
Dust can be easily collected by the dust collecting electrode 40, so that the dust collecting effect can be enhanced, the number of parts can be reduced, and the structure of the air purifier 1 can be simplified and the cost can be reduced. There is also the advantage that you can.

[0024]

As described above, according to the first aspect of the present invention, the dust charging means and the ion wind inducing means are provided on the upstream side in the wind path from the suction to the blowout, and the downstream side is provided on the downstream side. An air purifier in which a plate-shaped dust collecting electrode is arranged in parallel with the flow of ion wind, and an air purifier that applies a polarity opposite to that of the dust charging means to the dust collecting electrode is provided with a counter electrode facing the dust collecting electrode in parallel. Since a potential having the same polarity as the dust charging means or a ground level potential is applied to the counter electrode, an electric field can be generated between the dust collecting electrode and the counter electrode, and the distance from the dust collecting electrode can be increased. Since the dust at the location can be forcibly drawn to the dust collecting electrode by the electric field, the dust collecting by the dust collecting electrode becomes easy, and the dust collecting effect can be enhanced. Also, when the counter electrode is at a ground level potential, even if the main body is located close to the wall, no dust is charged near the wall because no electric field is generated between the main body and the wall. Therefore, the possibility of dust adhering to the wall is reduced, and the wall can be prevented from being stained.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the main body housing covering the outermost part of the air purifier has conductivity, and the main body housing also serves as the counter electrode. Therefore, by applying a potential of the same polarity as the dust charging means or a ground level potential to the conductive main body housing, an electric field can be generated between the dust collection electrode and the main body housing,
Dust at a distance from the collecting electrode can be forcibly attracted to the collecting electrode, so that dust can be easily collected by the collecting electrode without separately providing a counter electrode, and the dust collection effect is improved. , The number of parts can be reduced, and the structure of the air purifier can be simplified and the cost can be reduced.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the opposing electrodes are arranged on both sides of the dust collecting electrode.
During operation of the main unit, a ground-level potential is applied to the counter electrode disposed on the wall side, and a potential having the same polarity as that of the dust charging means is applied to the counter electrode disposed on the side opposite to the wall. An electric field can be generated between the dust collecting electrode and the opposing electrodes arranged on both sides of the dust collecting electrode, and dust at a distance from the dust collecting electrode on both sides of the dust collecting electrode is forcibly applied to the dust collecting electrode. Respectively, it is possible to further enhance the dust collecting effect of the dust collecting electrode, and when the main body is arranged close to the wall, the opposite electrode arranged on the wall side is grounded. By setting the potential to the level, an electric field is not generated between the main body and the wall, so that dust near the wall is not charged, and the possibility that dust adheres to the wall can be reduced. As a result, it is possible to prevent the wall from being stained while having a structure that can further enhance the dust collecting effect.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a perspective view of the air cleaner according to the first embodiment;

FIG. 3 is a perspective view showing a state where the main body cover is removed.

FIG. 4 is a perspective view showing a state where the discharge electrode block is removed.

FIG. 5 (a) is a schematic front view of the same pre-filter,
(B) is a side view.

FIG. 6 is a perspective view of the discharge electrode block of the above.

FIG. 7A is a side view of the discharge electrode block according to the first embodiment;
(B) is a plan view.

FIG. 8 is a perspective view of a dust collecting unit according to the embodiment.

FIG. 9 is a perspective view of a dust collecting electrode and a dust collecting paper of the above.

FIG. 10 is a sectional view of another embodiment.

FIG. 11 is a perspective view of still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air purifier 4 Wall 7 Counter electrode 40 Dust collection electrode

Claims (3)

[Claims] 1. A dust charging means and an ion wind inducing means are provided on the upstream side in an air path from suction to blowing, and a flat plate-shaped dust collecting electrode is arranged on the downstream side in parallel with the flow of ion wind. An air purifier for applying a polarity opposite to that of a dust charging means to a dust electrode, wherein a counter electrode is provided in parallel with the dust collecting electrode, and a potential of the same polarity as the dust charging means or a potential of a ground level is provided on the counter electrode. An air purifier characterized by applying a pressure. 2. The air purifier according to claim 1, wherein the main body housing covering the outermost part of the air purifier has conductivity, and the main body housing also serves as a counter electrode. 3. An opposing electrode is disposed on both sides of a dust collecting electrode, a ground level potential is applied to the opposing electrode disposed on the wall side during operation of the main body, and the opposing electrode disposed on the opposite side to the wall is operated. 2. The air purifier according to claim 1, wherein a potential having the same polarity as that of the dust charging means is applied to the electrode.